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  <title>The SplSubject interface</title>
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    <li><a href="index.html">PHP Manual</a></li>
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 <h1 class="title">The SplSubject interface</h1>
 

 <div class="partintro"><p class="verinfo">(PHP 5 &gt;= 5.1.0, PHP 7, PHP 8)</p>


  <div class="section" id="splsubject.intro">
   <h2 class="title">简介</h2>
   <p class="para">
    The <span class="classname"><strong class="classname">SplSubject</strong></span> interface is used alongside
    <span class="classname"><a href="class.splobserver.html" class="classname">SplObserver</a></span> to implement the Observer Design Pattern.
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  <div class="section" id="splsubject.synopsis">
   <h2 class="title">接口摘要</h2>


   <div class="classsynopsis">
    <div class="ooclass">
     
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    <div class="classsynopsisinfo">
     <span class="oointerface">
      <span class="modifier">interface</span> <strong class="interfacename">SplSubject</strong></span> {</div>

    <div class="classsynopsisinfo classsynopsisinfo_comment">/* 方法 */</div>
    <div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="methodname"><a href="splsubject.attach.html" class="methodname">attach</a></span>(<span class="methodparam"><span class="type"><a href="class.splobserver.html" class="type SplObserver">SplObserver</a></span> <code class="parameter">$observer</code></span>): <span class="type"><span class="type void">void</span></span></div>
<div class="methodsynopsis dc-description"><span class="modifier">public</span> <span class="methodname"><a href="splsubject.detach.html" class="methodname">detach</a></span>(<span class="methodparam"><span class="type"><a href="class.splobserver.html" class="type SplObserver">SplObserver</a></span> <code class="parameter">$observer</code></span>): <span class="type"><span class="type void">void</span></span></div>
<div class="methodsynopsis dc-description"><span class="modifier">public</span> <span class="methodname"><a href="splsubject.notify.html" class="methodname">notify</a></span>(): <span class="type"><span class="type void">void</span></span></div>

   }</div>


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<h2>目录</h2><ul class="chunklist chunklist_reference"><li><a href="splsubject.attach.html">SplSubject::attach</a> — Attach an SplObserver</li><li><a href="splsubject.detach.html">SplSubject::detach</a> — Detach an observer</li><li><a href="splsubject.notify.html">SplSubject::notify</a> — Notify an observer</li></ul>
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